Alloys or metallic compositions – Ferrous – Nine percent or more chromium containing
Patent
1990-11-30
1992-02-25
Yee, Deborah
Alloys or metallic compositions
Ferrous
Nine percent or more chromium containing
420 69, 420 70, 148325, C22C 3826, C22C 3822
Patent
active
050911473
ABSTRACT:
The present invention relates to a heat-resistant cast steel that comprises, on a weight basis, 0.06-0.20% C, 0.01-0.10% N, 0.4-2.0% Si, 0.3-1.0% Mn, not more that 0.04% P, not more than 0.04% S, 15-22% Cr, 0.01-2.0% Nb, with the balance being Fe and incidental impuriites, and further preferably that is retained at a temperature not higher than the temperature of two-phase mixed region for a cerain time and then is gradually cooled, after casting;
A heat-resistant cast steel that comprises, on a weight basis, 0.06-0.20% C, 0.01-0.10% N, 0.4-2.0% Si, 0.3-1.0% Mn, not more than 0.04% P, not more than 0.04% S, 15-22% Cr, 0.01-2.0% Nb, 0.2-1.0% Mo, with the balance being Fe and incidental impurities, and further preferably that is retained at a temperature not higher than the temperature of two-phase mixed region for a certain time and then is gradually cooled, after casting;
A heat-resistant cast steel that comprises, on a weight basis, 0.06-0.20% C, 0.01-0.10% N, 0.4-2.0% Si, 0.3-1.0% Mn, not more than 0.04% P, not more than 0.04% S, 15-22% Cr, 0.01-0.10% Ti, 0.2-1.0% Mo, 0.01-1.0% Ni, with the balance being Fe and incidental impurities, and further preferably that is retained at a temperature not higher than the temperature of two-phase mixed region for a certain time and then is gradually cooled, after casting; and
A heat-resistant cast steel that comprises, on a weight basis, 0.06-0.20% C, 0.01-0.10% N, 0.4-2.0% Si, 0.3-1.0% Mn, not more than 0.04 P, not more than 0.04% S, 15-22%, Cr, 0.01-2.0% Nb, 0.01-0.10% Ti, 0.2-1.0% Mo, 0.01-1.0% Ni, with the balance being Fe and incidental impurities, and further preferably that is retained at a temperature not higher than the temperature of two-phase mixed region for a certain time and then is gradually cooled, after casting.
REFERENCES:
patent: 3029171 (1962-04-01), Rostoker et al.
patent: 3700432 (1972-10-01), Brickner
Akiyama Koichi
Ike Masahide
Kawai Kunio
Kubo Kimio
Ohtsuka Kouki
Hitachi Metals Ltd.
Nissan Motor Co,. Ltd.
Yee Deborah
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